org.simantics.g3d.vtk/src/org/simantics/g3d/vtk/handlers/ParallelPerspectiveHandler.java

   1 /*******************************************************************************
   2  * Copyright (c) 2012, 2013 Association for Decentralized Information Management in
   3  * Industry THTH ry.
   4  * All rights reserved. This program and the accompanying materials
   5  * are made available under the terms of the Eclipse Public License v1.0
   6  * which accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *     VTT Technical Research Centre of Finland - initial API and implementation
  11  *******************************************************************************/
  12 package org.simantics.g3d.vtk.handlers;
  13
  14 import javax.vecmath.Vector3d;
  15
  16 import org.eclipse.core.commands.AbstractHandler;
  17 import org.eclipse.core.commands.Command;
  18 import org.eclipse.core.commands.ExecutionEvent;
  19 import org.eclipse.core.commands.ExecutionException;
  20 import org.eclipse.ui.IWorkbenchPart;
  21 import org.eclipse.ui.handlers.HandlerUtil;
  22 import org.simantics.g3d.math.MathTools;
  23 import org.simantics.g3d.vtk.common.VtkView;
  24 import org.simantics.utils.threads.AWTThread;
  25 import org.simantics.utils.threads.ThreadUtils;
  26
  27 import vtk.vtkCamera;
  28 import vtk.vtkRenderer;
  29
  30 public class ParallelPerspectiveHandler extends AbstractHandler {
  31
  32
  33         @Override
  34         public Object execute(ExecutionEvent event) throws ExecutionException {
  35                 Command command = event.getCommand();
  36                 boolean oldValue = HandlerUtil.toggleCommandState(command);
  37                 final boolean activate = !oldValue;
  38
  39                 final IWorkbenchPart ap = HandlerUtil.getActiveEditor(event);
  40                 final VtkView panel = (VtkView)ap.getAdapter(VtkView.class);
  41
  42                 ThreadUtils.asyncExec(AWTThread.getThreadAccess(), new Runnable() {
  43
  44                         @Override
  45                         public void run() {
  46                             vtkRenderer ren = panel.getRenderer();
  47                             vtkCamera cam = ren.GetActiveCamera();
  48                                 if (activate){
  49
  50                                         Vector3d focal = new Vector3d(panel.getRenderer().GetActiveCamera().GetFocalPoint());
  51                                         Vector3d pos = new Vector3d(panel.getRenderer().GetActiveCamera().GetPosition());
  52                                         double dist = MathTools.distance(pos, focal);
  53                                         cam.SetParallelScale(dist/4.0);
  54                                         // camera must be moved backwards, or graphics get clipped when parallel view is zoomed out
  55                                         // TODO : is there a better way to do this?
  56                                         Vector3d dir = new Vector3d(pos);
  57                                         dir.sub(focal);
  58                                         dir.normalize();
  59                                         dir.scale(100);
  60                                         dir.add(focal);
  61                                         cam.SetPosition(dir.x, dir.y, dir.z);
  62
  63                                         cam.SetParallelProjection(1);
  64                                         ren.ResetCameraClippingRange();
  65                                 } else {
  66
  67                                     double scale = cam.GetParallelScale();
  68                                         cam.SetParallelProjection(0);
  69
  70                                         Vector3d focal = new Vector3d(panel.getRenderer().GetActiveCamera().GetFocalPoint());
  71                     Vector3d pos = new Vector3d(panel.getRenderer().GetActiveCamera().GetPosition());
  72                     Vector3d dir = new Vector3d(pos);
  73                     dir.sub(focal);
  74                     dir.normalize();
  75                     dir.scale(scale*4.0);
  76                     dir.add(focal);
  77                     cam.SetPosition(dir.x, dir.y, dir.z);
  78                                         ren.ResetCameraClippingRange();
  79
  80                                 }
  81                                 panel.refresh();
  82
  83                         }
  84                 });
  85
  86                 return null;
  87
  88         }
  89
  90
  91
  92 }